- LICENSE (GPL-3.0) at the root; an MIT LICENSE in each components/aes67_*
and in web/, so they travel with the code when reused.
- THIRD_PARTY.md: third-party code and licences, and the known conflict of
the Espressif binary audio libraries with GPL-3.0 (firmware contains cspot).
- CLAUDE.md: rule to keep GPL code out of the core; phase 2 item to replace
the Espressif binaries (opencore-aacdec, Speex resampler).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Firmware: status.ptp.offset_avg_ns = mean |offset| over the last 2 min
(one bucket per second, cleared on a clock step).
- Main panel: Time Offset (2 min avg) shows only the Bolero bracket of the
average. Details: the current offset (coloured by the same brackets),
hops, time/frequency traceable, version and own clock class.
- Uptime shown as "1d 2h 3m 4s".
- Preset buttons renamed: "Riedel PTP defaults", "AES67 Media PTP defaults".
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
It behaved exactly like auto (clock class 248); the only difference was a
priority1 suggestion in the page. Roles are now slave|auto; to prefer this
device, use auto with a low priority1. A stored "master" is converted to
auto at boot (new cfg_set_string, like cfg_set_number).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The hw_ts config key was never read (hardware timestamps are always used);
the checkbox suggested it could be turned off. Removed from the config,
the page and the docs; status.ptp.hw_ts still reports it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
e.g. 0.0.1-1d613b1: the first part is set by hand, the hash says which
commit was built. No dirty flag (the build always patches cspot).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The version is now set by hand in version.txt, so it's readable and only
changes on purpose. git describe gave commit hashes, and always "-dirty"
because the build applies patches to the cspot submodule. Editing the file
is enough; the next build picks it up.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
All sources (player, test signals) are 48 kHz; at 96 kHz Spotify and HLS
played at the wrong speed. Validation, the page and the docs allow 48000
only, and a 96000 stored before is reset to 48000 at boot (stored values
aren't re-validated, and the SDP would still have said 96 kHz).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
docs/user-guide.md covers setup, the web page, sources and failover, the
Spotify developer app, AES67 output and SDP/SAP, PTP presets, network and
static IP, logging, firmware updates (OTA and USB), the player API,
troubleshooting and known limitations.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Picks the port, checks ESP32-P4 / chip revision against the image header /
32 MB flash, optionally erases, writes the images from build/flash_args,
reads the boot log for the IP and sets hostname, stream/Spotify name and
multicast address over the API. All questions also work as options.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The page starts dark regardless of the system setting; the toggle at the top
right switches to light and is remembered in the browser. [hidden] now
always wins: label{display:block} had overridden it, so the hidden VLAN
split checkbox still showed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The firmware doesn't apply the VLAN split yet (phase 2). The checkbox is
hidden, which also keeps the internet-interface fields and "Web UI / API on"
hidden; the markup stays for phase 2.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
net.dhcp = false applies ip/mask/gw/dns on link up (DHCP client stopped).
PTP/TX/SAP sockets are bound to the address, so a changed IP setup reboots
the device; with DHCP on, the static fields (UI fills them with the lease)
don't count as a change. Validation: contiguous netmask, not the network or
broadcast address, gateway in the subnet. The page follows the device to the
new address after saving. Checked: DHCP -> static .245 (PTP, TX, SAP, SDP
origin, mDNS on the new address) -> DHCP.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With DHCP on, the greyed-out IP/netmask/gateway/DNS fields show the
addresses in use. Unticking DHCP keeps them as the starting point for a
static setup. (Static addressing itself is not applied yet.)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Core: aes67_tx_pink_noise(), a ready-made TX source: xorshift32 white noise
through Paul Kellet's pink filter, -18 dBFS RMS (peaks about -6 dBFS), same
on L and R. The player uses it like the tone (straight to TX, no volume or
gain). Checked on the board: -18 dBFS RMS, octave bands 63 Hz-4 kHz flat
within +-0.4 dB, L = R.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
It was in the config and UI but never applied. The gain now saturates at
full scale (the trim boosts up to +12 dB). Checked on HLS: -12 dB lowers
the peak by exactly 12 dB, +12 dB clips cleanly at 0 dBFS.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The pull callback's contract said "stream channels", but the player always
delivers stereo, so a 1-channel stream went out as L,R,L,R at half speed.
Sources now always deliver AES67_TX_SRC_CHANNELS (2); TX maps to the stream:
2 ch as is, 1 ch = (L+R)/2 in 64 bit with mono_sum (can't clip), else L.
Checked: mono packets 156 B, 1000/s, 48 samples each, SDP L24/48000/1.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Save/Revert/Reboot and the status message stay at the bottom of the window
while the settings form is in view. The runtime source override stays in
the API (listed in the page's API box) but is no longer on the page, where
it duplicated the saved source mode.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The player now owns the effective mode (config or override) and passes it
down: spotify_apply(enable) and hls_set_url(url) instead of both reading
source.mode from the config. /api/player/source forces spotify|hls|off
(config returns to the saved mode), /api/player/url plays an m3u8 now;
neither is saved. GET reports it in `forced`.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Follows /api/player's position, moves on locally between polls while
playing, seeks on release; disabled when the source can't seek.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
seek {ms} runs on the Spotify session task like a seek from the app (buffer
flushed, app notified). volume {value}|{delta} sets the player volume and
pushes it to the session, so the app's slider follows; setRemoteVolume now
also runs on the session task.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
play/pause/toggle/stop/next/prev. Spotify commands run on the session task
(same thread as cspot's frame handling) and the POST waits until they ran,
so it answers the new state. HLS pause stops fetching and resume rejoins at
the live edge; next/prev on HLS and anything on tone/off return 409.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Source, state, artist/title/album, position and duration (from cspot's
playback state, so it matches the app), volume and `can`. cspot patch 0004
adds read getters for the playback state and context.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
No Spotify session (or paused, with failover_on_pause) for failover_delay_s
switches to HLS; Spotify playing switches back within ~1 s. Switches fade
out/in over 30 ms and flush the ring. HLS is suspended while Spotify plays.
cspot is held back instead of drained while it isn't Spotify's turn: it keeps
decoding on pause, so dropping its frames let it race through the queue.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Mac dropped the device soon after the first track change: we never
called SpircHandler::notifyAudioReachedPlayback(), so cspot's queue did
not advance and the state sent to Spotify stalled.
- The data callback records a boundary (output write position, track
id) when the track id changes; the session loop (<= 200 ms) calls
notifyAudioReachedPlayback(id) once playback (ring read position)
passes it, and notifyAudioEnded() after DEPLETED once the buffer is
empty. PLAYBACK_START clears boundaries (next data is a new one),
seek/flush drop pending ones.
- audio_ring exposes its write/read frame counters (wrap-safe compare).
- Verified: 10 min on the Mac without a disconnect, every track change
notified ("track audible, Spotify notified"), app shows the playing
track (switches up to ~3-5 s early), 0 underruns.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Spotify AP reset the connection (recv -1, errno 104 ECONNRESET) on
the third Ping, every 6 minutes, like clockwork. cspot answered each
Ping at once; librespot (core/src/session.rs) waits 60 s:
Ping -> 60 s -> Pong -> PongAck -> 60 s -> Ping.
- 0003-delayed-pong: record the Ping, send the Pong 60 s later from
triggerTimeout() (called on every 3 s receive timeout), through the
PR #3 connection snapshot; dropped on reconnect.
- 0002-diag-log-recv-errors: log recv's return value/errno before
"Error in read" (error path only); this is what showed the RST.
Verified: over 8+ minutes Ping/delayed Pong/PongAck every 2 min, no
reset at the 6-minute mark.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
MercurySession::reconnect() nulls conn/shanConn (for 5 s per failed
retry) while other tasks keep sending through them: a NULL dereference,
not a catchable exception. Our Spotify sessions are dropped by the
server and reconnect every ~6 minutes, so this race is hit regularly;
likely behind the sporadic resets during long sessions/OTA.
Patch applies cleanly to the pinned 3010349; builds, boots, confirmed.
Drop it once the fix is in the pinned cspot commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- OTA: the player now ends the Spotify session (spotify_suspend: stop
flag, waits until the session's tasks are gone, refuses new ones)
instead of pausing it, and suspends HLS. Pausing was not enough (an
upload still failed once with a paused session). Verified twice with a
session running for minutes: "Disconnecting mercury session / session
ended / suspended", installed in ~26 s, clean reboot.
- Volume: createFromBlob() starts cspot at volume 0, which the app
showed while we played at 100 %. The session now starts with the
player's volume (spotify_set_volume); volumes coming from the app are
stored exactly, without echo. Verified: slider starts at 100 %.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- spotify_init() sets up the logger, zeroconf routes and session task
once; spotify_apply() (at boot and on every source save) enables or
disables: enabled = mode spotify/auto + credentials. Disable removes
the mDNS entry, zeroconf answers 404 and a running session ends
(loop exits within 200 ms, SpircHandler::disconnect stops the queue
and player tasks). A new device name ends the session and
re-advertises. The login blob is swapped under a mutex.
- Verified: hls/spotify/rename switch the mDNS entry and /spotify_info
(404/200) live; switching to hls during Spotify playback ended the
session in < 2 s, HLS played after ~5 s, internal heap 221 -> 365 KB
(cspot frees everything).
- CLAUDE.md: OTA-with-session findings (intermittent, flash-write stalls
seen as TX resyncs during uploads), serial-port reset caveat.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
An upload during an active Spotify session crawled (~10 kB/s, 197 s)
and ended in a reset (seen twice). Workaround:
- aes67_ota_on_update(cb): cb(true) right before an accepted upload
writes flash, cb(false) if it then fails.
- The player pauses Spotify (spotify_pause -> SpircHandler::setPause, the
app follows) and suspends HLS fetching (hls_suspend); resumed if the
upload fails. AES67 TX keeps running (silence).
- Verified: upload during Spotify playback paused the session and
installed in 25.8 s (normal for 2 MB), clean reboot and self-test.
Root cause still open (noted in CLAUDE.md with the other cspot items).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- player: volume 0..100 %, amplitude = (v/100)^3 (about -18 dB at 50 %,
0 = mute), applied in the TX pull callback after the ring so a change
is heard at once (the ring holds 4 s); ramped over one packet to avoid
zipper noise. Spotify VOLUME events (0..65535) set it.
- Docs: pipeline order ring -> volume/gain, curve described.
- Verified from a Mac: RMS followed the slider immediately (100 % about
-10 dBFS; steps to about -24.5 and -28 dBFS match the cubic curve for
~57 % / ~50 %); user: "sounds about right". Mute at 0 % not yet
confirmed (check via /api/player/volume later).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- spotify_init(pcm_cb, event_cb): cspot's data callback hands 44.1 kHz
stereo s16 PCM to the player and returns what was taken; the player's
blocking ring write paces decoding to playback speed.
- Events: FLUSH/SEEK/PLAYBACK_START empty the ring (skip/seek sound at
once); PLAY_PAUSE pauses output (silence, buffer kept, no underrun);
VOLUME logged (applied in b4).
- player: Spotify via its own audio_out converter (44.1 -> 48 kHz);
source_state playing / paused / buffering.
- Verified from a Mac: music on the AES67 stream (10 s: 0 gaps, no
silent packets, RMS -9.6 dBFS, peak 0.0 dBFS), buffer 4.0 s full,
0 underruns, pause/play/skip/seek events.
Seen: first 3 connects "Can't connect to spotify servers", 4th worked.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- main/audio_out: one converter instance per source (own rate converter
state): s16 any rate/channels -> 48 kHz stereo int32 -> ring.
- player_write(src, ...) only writes for the active source, drops the
rest; player_src_t is public in player.h.
- HLS decoder uses audio_out (no behaviour change).
- Verified: HLS still sample exact (441344 -> 480375 frames per
10.008 s segment), buffer ~4 s, 0 underruns.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Zeroconf on our httpd (GET/POST /spotify_info, form body URL-decoded)
and _spotify-connect._tcp via our mDNS (VERSION, CPath, Stack TXT).
- Session task: waits for the app's login blob, connects with the
user's client ID/secret and the configured bitrate (96/160/320 ->
OGG_VORBIS_*), SpircHandler, events logged; cspot exceptions caught.
Starts when source.mode is spotify/auto and credentials are set.
- bell::bellGlobalLogger was NULL: every CSPOT_LOG crashed the board
right after addUser (Load access fault in Session.cpp:67 /
LoginBlob.cpp:58). cspot/bell logs now go to esp_log (UART + syslog);
signed CDN URL tokens are cut from the log.
- esp_audio_codec's own Vorbis decoder clashed with bell's Tremor
symbols: CONFIG_AUDIO_DECODER_VORBIS_SUPPORT / SIMPLE_DEC_OGG off.
- status.spotify_state from the session (waiting / connecting /
connected / login failed / error / disabled / no client credentials).
- Verified from a Mac: device appears, "connected as <user>", access
token fetched with the user's client credentials, track info, audio
key, CDN URL (the step broken upstream), PCM decoded. Without
backpressure a track decodes in ~26 s (b3 feeds the ring).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Core config: cfg_mark_secret(group, key). GET /api/config returns ""
for secret keys; a POST with "" keeps the stored value, null clears it;
cfg_get() returns the real value. Documented in aes67-core-base.md.
- source.spotify_client_id / spotify_client_secret (secret write-only):
each user's own Spotify developer app, needed by the maintained cspot
fork (philippe44/cspot) since Spotify's 2025 API restrictions.
- UI: client ID field, password field for the secret ("leave empty to
keep"), link to developer.spotify.com; enabled for spotify/auto modes.
- status.spotify_state: "no client credentials" while either is missing.
- Verified: secret never appears in GET; UI-style re-save keeps it;
survives reboot; null clears it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
HLS plays on AES67; list what to come back to (clock drift vs PTP,
download speed, untested cases) before moving on to cspot.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- decoder: s16 PCM -> stereo int32 -> esp_ae_rate_cvt 44.1 -> 48 kHz
(32-bit, complexity 3; bypassed at 48 kHz; mono duplicated) -> ring.
esp_audio_effects pinned to ~1.3.0 (1.4+ needs P4 rev >= 3).
- hls: each segment is downloaded completely into PSRAM (max 4 MB), then
decoded; the connection is not held open while the decoder waits for
ring space at playback speed.
- player: player_write() blocks while the ring is full and gives up when
the source changes; the temporary 440 Hz producer is removed.
- Verified with Triple J Hottest: 441344 -> 480375 frames (10.008 s) and
440320 -> 479260 (9.985 s) per segment; RTP 15000 packets, 0 gaps,
peak -10 dBFS / RMS -22 dBFS; ring ~4.0 s, 0 underruns over ~50 s;
heap 422 KB, PSRAM 27.5 MB free.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- main/decoder: MPEG-TS demux (packets reassembled across HTTP chunks,
PAT -> PMT -> first ADTS-AAC PID, PES headers stripped) feeding the
esp_audio_codec simple AAC decoder (ADTS, AAC-Plus enabled for HE-AAC
v1/v2 variants). 7.3 only counts and logs PCM per segment.
- esp_audio_codec pinned to ~2.5.0: 2.6+ needs P4 rev >= 3 (this board
is rev 1.3). Noted in CLAUDE.md, also for esp_audio_effects < 1.4.
- The library's combined TS decoder lost ~8% of the frames (segments
decoded to 7.9-9.6 s, "decode error -1"); with the own demux every
segment is sample exact: 441344 / 440320 frames = 10.008 / 9.985 s,
matching EXTINF 10.0078 / 9.9846 (431 / 430 AAC frames), no errors.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bsncubed